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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 01-07-12, 02:59 PM   #1
gayngs
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Over chain lubrication.

I was wondering if to much oil on chain would cause a failure like I had yesterday that resulted in me breaking my scapula and needing surgery to fix it (out for 4 months!). I installed the KMC SL 1/8 chain the day before and forgot to wipe off the excess oil. When I took it for a ride yesterday, I noticed when I accelerated the chain felt like it was skipping/draggin.
I went to pass a roadie and stood up in my drops, heard a pop and ate pavement; no helmet and luckily it was my shoulder that was smashed (helmet wearer from now on). Bike flew into the woods, and upon inspection just 2 scratches no dents etc, and the chain was still on the cogs; nothing looks like it would cause such a critical failure. Today I'm looking at the chain and when I touched it the cogs and chain are soaked in oil. Now would this over oiling cause this to happen? Thanks in advance, and here are some pics of the break.
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File Type: jpg broke my scapula 003.jpg (98.6 KB, 48 views)
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Old 01-07-12, 03:13 PM   #2
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Excess oil can't cause your chain to derail or break....even if it was dripping with oil, its not going to cause your chain to fail. I doesnt sound to me like the chain was at fault. It didn't break or derail. Maybe something, like a rock or chunk of metal got jammed into your drive chain, causing damage to your cog chainring and/or chain. Did you check you bike thoroughly to make sure it wasn't something else that broke? Its possible you popped a spoke, or your chainstay cracked in half...thats happened to me before, although it didn't cause a crash. Check your bike very carefully before you ride it again.

That's one nasty shoulder break.....heal fast!

Last edited by mihlbach; 01-07-12 at 03:18 PM. Reason: Typing on an ipad sucks.
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Old 01-07-12, 03:16 PM   #3
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the crash wasnt the result of your chain

more than likely you hit a rock and went flying or something
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Old 01-07-12, 04:19 PM   #4
gayngs
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The bike is fine. During my warm up before I go full speed, I noticed the chain making the changing gear noise and dragging type feeling in the clips. Then when I engaged full speed it souded like the chain snapped, but nothing is wrong with the chain or bike. It wasnt a stick or rock as I focus on the ground ahead when I engage in the drops.
bike is fixed btw.
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Old 01-07-12, 04:24 PM   #5
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chek your cog and lockring if loose they may create a sensation of slipping when you pedal hard
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Old 01-07-12, 04:42 PM   #6
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how tight was your chain? I had a similar noise once when my rear axle wasn't tight enough and my wheel moved a little fwd (causing tons of chain slack)
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Old 01-07-12, 04:55 PM   #7
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I can't make heads or tails of those pictures. To me, it looks like frozen puddles on the road.
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Old 01-07-12, 04:58 PM   #8
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Those scans make me cringe. Swift healing!
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Old 01-07-12, 06:07 PM   #9
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Chain is nice and tight, with the right amount of slack.
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Old 01-07-12, 06:39 PM   #10
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Found the culprit. The lock-ring was so loose I could take it off just with my fingers. Friend said, he thinks the rear cog tightened/locked up as the lock-ring came loose and that's what I heard pop. Sometimes it takes a break to realize checking everything on your bike before doing fast long distance runs is a great idea, and a helmet is not a bad idea.
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Old 01-07-12, 06:47 PM   #11
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how are the threads on your hub after that? what lockring were you using btw? I had problems with one slipped a lot on account of not being able to get my cog on there as tight as it should be. luckily I'm a ***** so when something feels weird when I leave, I do a few circles and stops around my block to make sure it doesn't happen again. I bet you will too now

glad you're okay btw
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Old 01-07-12, 06:50 PM   #12
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A ***** to get off, so I think it's stripped. Thanks Ham.
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Old 01-07-12, 07:44 PM   #13
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That's some ****ty luck. How long ago was the cog installed?
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Old 01-07-12, 07:50 PM   #14
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I installed it about 6 months ago. It was loose about 2 weeks ago I just forgot to re-tighten it, as I usually ride my Trek.
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Old 01-07-12, 08:09 PM   #15
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All kidding aside, did the roadie laugh at you or help you pull yourself together?
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Old 01-07-12, 08:18 PM   #16
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i'm over chain lubrication, too.

but seriously, heal up.
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Old 01-07-12, 08:20 PM   #17
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All kidding aside, did the roadie laugh at you or help you pull yourself together?
He was cool, and walked with me to the next overpass, which was 3 mil away from crash.
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Old 01-07-12, 08:21 PM   #18
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what pain factor are we talking here
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Old 01-07-12, 08:24 PM   #19
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Friend said, he thinks the rear cog tightened/locked up as the lock-ring came loose and that's what I heard pop.
Having a hard time understanding what happened. The rear cog was loose and then when you stood up it tightened and threw you?
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Old 01-07-12, 08:25 PM   #20
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Yeah, it seems as though my torquing power tightened the cog which was not tightened all the way down, and when it tightened with my force it caused a snap like reaction which threw me.
As someone that can take a lot of pain, around a 9 on a 10 point scale. Even with all the nice pain meds, every little movement or slight bump makes it to the top of my pain list.
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Old 01-07-12, 08:27 PM   #21
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I can't make heads or tails of those pictures. To me, it looks like frozen puddles on the road.
Me too, haha.

Glad to hear you're okay.
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